Vibramate - Strap Pin Bushing Kit The Vibramate Strap Pin Bushing is designed and custom manufactured in the United States for use specifically with Bigsby "Original" B7 or B3 vibratos where a spacer is desired through the Bigsby Hinge Plate for use with your Strap Button or Strap-Lock. Custom machined from high quality aluminum the Vibramate Strap Pin Bushing is designed for both clearance through the Hinge Plate slot for your Strap Button as well as providing additional clamping pressure to the tail of the guitar. Us